12MM (.500) DIAMETER. YOU CAN USE THE F STEM AS HOLDER IN A HAND DRILL, MILL, OR ANY OTHER HOLDING DEVICE THAT SUITS YOUR SPECIFIC NEED. THE STEM HOLDER IS THREADED (EXTERNALLY) AND THE F STYLE BLADE IS ALSO THREADED (INTERNALLY)

20MM (.750) YOU CAN USE THE F STEM AS HOLDER IN A HAND DRILL, MILL, OR ANY OTHER HOLDING DEVICE THAT SUITS YOUR SPECIFIC NEED. THE STEM HOLDER IS THREADED (EXTERNALLY) AND THE F STYLE BLADE IS ALSO THREADED (INTERNALLY)

30MM (1.250) YOU CAN USE THE F STEM AS HOLDER IN A HAND DRILL, MILL, OR ANY OTHER HOLDING DEVICE THAT SUITS YOUR SPECIFIC NEED. THE STEM HOLDER IS THREADED (EXTERNALLY) AND THE F STYLE BLADE IS ALSO THREADED (INTERNALLY)